Changing the height of the header can be done with some simple CSS.
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By default, the KickstartCassiopeia module allows to set a background-color for your header.
KickstartCassiopeia enables you to use a mobile contact bar.
The new Cassiopeia template comes with a lot of module positions.
Setting up the menu differenly as default can be done with some CSS.
KickstartCassiopeia has the option to set link colors.
How to setup colors for your next Joomla4 website is explained here.
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